Meilhaus electrical components Germany Meilhaus model Meilhaus price

Meilhaus electrical components are wires that transmit current. Usually, current transmission is point-to-point. Power cords can be divided into AC AC power cords and DC DC power cords according to their use. Usually, AC power cords are wires that carry higher voltage alternating current. Due to the high voltage, these wires require unified standards and safety certification before they can be officially produced. DC cords basically carry lower voltage direct current, so the safety requirements are not as strict as those for AC cords. However, for safety reasons, countries still require unified safety certification.

Meilhaus electrical component classification

Plug-in fuses are often used at the end of lines for short-circuit protection of distribution branch circuits or electrical equipment. The upper cap of the screw-type fuse element has a blow indicator. Once the element blows, the indicator pops out immediately and can be observed through the glass hole on the ceramic cap. It is often used in machine tool electrical control equipment. Screw-type fuses. Enclosed fuses are divided into filled fuses and unfilled fuses. Filled fuses generally use square porcelain tubes containing quartz sand and the fuse element, offering strong breaking capacity. Unfilled enclosed fuses enclose the element in a sealed cylinder, with slightly lower breaking capacity. Fast-acting fuses are mainly used for short-circuit protection of semiconductor rectifier elements or rectifier devices. Since semiconductor components have very low overload capacity and can only withstand large overload currents for an extremely short time, short-circuit protection requires fast blowing capability. The structure of fast-acting fuses is basically the same as that of filled enclosed fuses, but the element material and shape are different; it uses a silver sheet stamped with a V shaped deep groove variable cross-section element. Fast-acting fuses are usually referred to as "fast fuses". Their characteristics include fast blowing speed, high rated current, strong breaking capacity, stable current-limiting characteristics, and small size. Self-resetting fuses use sodium metal as the element, which has high electrical conductivity at room temperature. When a short-circuit fault occurs in the circuit, the short-circuit current generates high temperature, causing the sodium to vaporize rapidly. The gaseous sodium presents a high-resistance state, thereby limiting the short-circuit current. After the short-circuit current disappears and the temperature drops, the sodium metal restores its original good conductivity. Self-resetting fuses can only limit short-circuit current and cannot truly disconnect the circuit. Their advantage is that the element does not need to be replaced, allowing for repeated use.

Meilhaus electrical component structure

For rubber and plastic power cord conductors used for power, lighting, and internal installation of electrical equipment, copper cores are preferred. For large cross-section wires, compacted wire cores are recommended. Conductors for fixed installation generally adopt Class 1 or Class 2 conductor structures. Insulation materials generally include four types: natural styrene-butadiene rubber, polyvinyl chloride (PVC), polyethylene, and nitrile-PVC compounds. Heat-resistant power cords use PVC with a temperature resistance of 90 °C. Sheath materials generally include five types: PVC, cold-resistant PVC, ant-proof PVC, black polyethylene, and neoprene rubber. Black polyethylene and neoprene sheathed power cords are suitable for extreme cold resistance and outdoor overhead laying. In environments with external forces, corrosion, or humidity, rubber or plastic sheathed power cords can be used. Rubber and plastic flexible power cords use copper cores with a flexible structure, consisting of stranded single wires. Flexible conductors generally adopt Class 5 or Class 6 conductor structures. Insulation materials generally include natural styrene-butadiene rubber, PVC, or soft polyethylene plastic. The cabling pitch multiple is small. The outer protective layer uses cotton yarn braiding to prevent overheating and damage to the insulation layer. To facilitate use and simplify the production process, a three-core balanced structure is adopted, which saves production man-hours and improves production efficiency. For shielded insulated power cord conductors, tinning is allowed in certain occasions. The surface coverage density of the shielding layer should comply with standards or meet user requirements. The shielding layer should be braided or wrapped with tinned copper wires. If an extruded sheath is added outside the shield, the shield may use soft round copper wire braiding or wrapping. To prevent internal interference between wire cores or pairs, structures with individual phase shielding for each core (or pair) can be produced. General-purpose rubber-sheathed rubber power cord conductors use stranded soft copper wires with a flexible structure. Paper wrapping is allowed on the surface of large cross-sections to improve bending performance. Insulation uses natural styrene-butadiene rubber, which has good aging performance. Rubber for outdoor products uses neoprene or a neoprene-based mixed rubber formula. Mining rubber power cord conductors use copper cores with a flexible structure, consisting of stranded single wires. Flexible conductors generally adopt Class 5 or Class 17 conductor structures. Insulation materials generally use rubber. The cabling pitch multiple is small. Many products use metal braiding to uniform the electric field and improve the sensitivity display of insulation status. They have a thicker outer sheath and are color-coded underground in mines to help construction personnel understand the different voltage levels of the rubber power cords.

Meilhaus electrical component principle

A circuit breaker generally consists of a contact system, an arc-extinguishing system, an operating mechanism, a trip unit, and a housing. During a short circuit, the magnetic field generated by the high current overcomes the counterforce spring, causing the trip unit to actuate the operating mechanism and instantly trip the switch. During an overload, the current increases, intensifying heat generation; the bimetallic strip deforms to a certain extent to push the mechanism into action (the higher the current, the shorter the operating time). Electronic types use current transformers to collect the current magnitude of each phase and compare it with the set value. When the current is abnormal, the microprocessor sends a signal to cause the electronic trip unit to drive the operating mechanism. The function of a circuit breaker is to connect and disconnect load circuits, as well as to interrupt fault circuits, preventing the expansion of accidents and ensuring safe operation. Arc extinction is a problem that must be addressed in high-voltage circuit breakers. The principle of arc blowing and extinction mainly involves cooling the arc to weaken thermal ionization. On the other hand, arc blowing elongates the arc to strengthen the recombination and diffusion of charged particles, while simultaneously blowing away charged particles from the arc gap, rapidly restoring the dielectric insulation strength. Low-voltage circuit breakers, also known as automatic air switches, can be used to connect and disconnect load circuits, and can also control motors that start infrequently. Their functionality is equivalent to the sum of part or all of the functions of electrical components such as knife switches, overcurrent relays, undervoltage relays, thermal relays, and residual current protective devices. They are important protective electrical appliances in low-voltage distribution networks. Low-voltage circuit breakers have multiple protection functions (overload, short circuit, undervoltage protection, etc.), adjustable operating values, high breaking capacity, convenient operation, and safety advantages, so they are widely used. Structure and working principle: A low-voltage circuit breaker consists of an operating mechanism, contacts, protective devices (various trip units), and an arc-extinguishing system. The main contacts of a low-voltage circuit breaker are closed manually or electrically. After the main contacts close, the free-trip mechanism locks the main contacts in the closed position. The coil of the overcurrent trip unit and the heating element of the thermal trip unit are connected in series with the main circuit, while the coil of the undervoltage trip unit is connected in parallel with the power supply. When a short circuit or severe overload occurs in the circuit, the armature of the overcurrent trip unit pulls in, causing the free-trip mechanism to actuate and the main contacts to disconnect the main circuit. When the circuit is overloaded, the heating element of the thermal trip unit generates heat, causing the bimetallic strip to bend and push the free-trip mechanism into action. When the circuit voltage is too low, the armature of the undervoltage trip unit releases, also causing the free-trip mechanism to actuate. The shunt trip unit is used for remote control; during normal operation, its coil is de-energized. When remote control is required, pressing the start button energizes the coil.

Weidou Intelligent Technology professionally sells German Meilhaus connectors, Meilhaus switches, Meilhaus relays, Meilhaus controllers, Meilhaus plugs, Meilhaus sensors, Meilhaus resistors, Meilhaus capacitors, Meilhaus buses, Meilhaus modules, Meilhaus cables, Meilhaus power supplies, Meilhaus interfaces, Meilhaus gateways, Meilhaus circuit breakers, Meilhaus original imports from Germany. Welcome customers to inquire and order.